Malicious PDF — malware analysis report

Static analysis result for SHA-256 59d3f45c94e52bed…

MALICIOUS

PDF

80.4 KB Created: 2021-07-24 06:58:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: af38bbee264f700af67cb2c448d01329 SHA-1: 99c7c133a0e822f906d1e1c62a27f39b95cca611 SHA-256: 59d3f45c94e52bed79a1e1efe52860fe1e0e70c2a991e5fe94d2ea5d5cc872e0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs pointing to compromised WordPress upload directories and other disposable hosting. The primary purpose appears to be directing users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8784

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db891733c1d---xaviponofosekuroxuga.pdf In PDF document text
    • http://csc0512.com/userfiles/file/20210618102933_53iglh.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/83029150085.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/jebetoximewi.pdfIn PDF document text
    • http://cwesp.biz/upload/file/bitevufikiwejojijus.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-7-24/20210724021049551241.pdfIn PDF document text
    • https://tanthuantelecom.com/upload/fck/file/34384558249.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bf21e308fa4---sitipatarupomuremexe.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/89771275650.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/39604448065.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/d31f8ef9451b580bbe0f45af42d1e04f/xifibebaxe.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0cd381111---47472812501.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0bdf61662---52512593854.pdfIn PDF document text
    • https://fentesmakina.com/paket/upload/files/pogibuliduxawofarefuriza.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe6cd59edb---59194020397.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/38311978547.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a0699f9a7e5---80853108782.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/75162686486.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4461808e49---zekeges.pdfIn PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/25983949835.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/c7d77f522923b5a690b869c565a3d185/gozazowapunekir.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c39b2bb1748---53788913609.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/20208857496.pdfIn PDF document text
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/powesivesenaro.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aab1c2ba2b2---befaduzesuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=lg+direct+drive+dishwasher+oe+error+codePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010edd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDD 16908 bytes
SHA-256: f2b94b72711410770c9f6bc7f6422832a749e17564dc5d8587f3cd7d94d77009

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